Material distributive topology design of UWB antenna using parallel computation of improved BPSO with FDTD

2018 ◽  
Vol 11 (2) ◽  
pp. 190-198
Author(s):  
A. P. Thilaga Shri Chandra ◽  
L. Senthilkumar ◽  
M. Meenakshi
Keyword(s):  
Parallel Computation ◽  
Fitness Function ◽  
Impedance Matching ◽  
Fdtd Method ◽  
Wide Band ◽  
Topology Design ◽  
Fdtd Simulation ◽  
Position Vector ◽  
Binary Particle Swarm Optimization ◽  
Uwb Antenna

AbstractIn this article, the material distributive topology-based design optimization of ultra-wide band (UWB) antenna is proposed by using improved binary particle swarm optimization (BPSO) with finite difference time domain (FDTD) method. In the improved BPSO implementation, the velocity of each particle is calculated based on complete set of bits of particle position vector. The V-shaped transfer function is employed to transform all real values of velocities to values in the interval [0,1]. The fitness function of all the particles in BPSO algorithm are computed parallely by using FDTD simulation. The usage of FDTD and the parallel computation helps in analyzing the broadband frequency characteristics of the antenna with a single simulation run. The return loss of the optimized UWB antenna obtained from FDTD, Computer Simulation Technology (CST) simulation and practical measurement are in good agreement and show good impedance matching.

A Tapered Fork-Shaped Antenna With Small Ground Plane for UWB Applications

2021 ◽  
Vol 13 (1) ◽  
pp. 13-24
Author(s):  
Amro A. Nour ◽  
Ali Bostani ◽  
Girish Awadhwal
Keyword(s):  
Finite Element ◽  
Impedance Matching ◽  
Ground Plane ◽  
Wide Band ◽  
Federal Communications Commission ◽  
Ultra Wideband ◽  
Design Parameters ◽  
Uwb Antenna ◽  
Bandwidth Enhancement ◽  
Uwb Applications

A tapered fork-shaped antenna having small ground for ultra-wide band (UWB) antenna is proposed in this paper. Finite element method has been successfully employed to simulate and optimize the feed line, ground, and tapered fork-shaped diameter to enhance the performance of the antenna in terms of bandwidth obviously for the ultra-wideband purposes. An acceptable impedance matching performance has been achieved, which is a band wider than the UWB band that is defined by the Federal Communications Commission (FCC). In this paper, the detailed design parameters including the key elements in bandwidth enhancement is presented. The results of the finite element simulations have been presented as well indicating the return loss and radiation pattern of the proposed antenna.

scholarly journals Implementation of Compact Ultra wide Band Antenna Design for Breast Cancer Tumor detection

2019 ◽  
Vol 8 (4) ◽  
pp. 4701-4709
Keyword(s):  
Breast Cancer ◽  
Impedance Matching ◽  
Wide Band ◽  
High Gain ◽  
Ultra Wide Band ◽  
Uwb Antenna ◽  
Directional Radiation ◽  
Ansoft Hfss ◽  
Cancer Tumor ◽  
Accurate Position

One of the applications of UWB antenna is for detecting a cancer tumor according to breast cancer model system. The absolute dimensions of antenna are 44x30mm2 having a thickness of 1.6 mm. It involves Ultra wide band of 80% frequency range of 3 GHz–12 GHz for the FCC band. The proposed antenna resulted high gain and omni-directional radiation patterns and a considerable impedance matching. The optimized functioning of the antenna is illustrated by the simulation results. This antenna has been implemented in a designed system model with dielectric properties of a human breast capable to detect peculiar bodies. The tumor is detected and examined by the received Proportions and Positional coordinates, accessed by the application of UWB antenna. The accurate position coordinates of the tumor inside the breast are obtained at the places with the least Specific absorption rate (SAR). The antenna was used to localize the tumor precisely which shows the excellent functioning of the antenna and device. The proposed device is simulated by using Ansoft HFSS software and also CST Microwave studio simulator developed the breast model.

scholarly journals REASERCH ON A WATER-IMMERSED WIDE BAND HORN ANTENNA WITH WATER-FILLED COAXIAL IMPEDANCE MATCHING STRUCTURE

2019 ◽  
Vol 77 ◽  
pp. 115-123 ◽  
Author(s):  
Yang Yang ◽  
Lianghao Guo ◽  
Qing Zhou ◽  
Zhe Wu ◽  
Haibo Jiang ◽  
...  
Keyword(s):  
Impedance Matching ◽  
Wide Band ◽  
Horn Antenna ◽  
Matching Structure

scholarly journals Reconfigured and Notched Tapered Slot UWB Antenna for Cognitive Radio Applications

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Tamer Aboufoul ◽  
Akram Alomainy ◽  
Clive Parini
Keyword(s):  
Cognitive Radio ◽  
Impedance Matching ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Total Efficiency ◽  
Back Side ◽  
Radiation Patterns ◽  
Uwb Antenna ◽  
Design Concepts ◽  
Specific Frequency

A compact reconfigurable and notched ultra-wideband (UWB) tapered slot antenna (TSA) is presented. The antenna reconfiguration operation principle relies on 2 mechanisms: in the first mechanism a resonator parasitic microstrip line electrically coupled to the TSA is used to notch the TSA at a specific frequency and the second mechanism relies on changing the input impedance matching of the antenna by means of changing the length of a stub line extended from an additional tiny partial ground on the back side of the antenna. The reflection coefficient, radiation patterns, and gain simulations and measurements for the proposed antenna are presented to verify the design concepts featuring a very satisfactory performance. Total efficiency simulations and measurements are also presented to highlight the filtering performance of the reconfigured antenna. When the antenna was reconfigured from the UWB to work into multiple frequency bands, the radiation patterns were still the same and the total peak gain has slightly improved compared to the UWB case. In addition, when the antenna operated in the notched mode, the gain has significantly dropped at the notch frequency. The simplicity and flexibility of the proposed multimode antenna make it a good candidate for future cognitive radio front ends.

scholarly journals A Novel Compact Microstrip UWB Rectangular Stair Slot Antenna for the Analysis of Return Losses

2019 ◽  
Vol 8 (10) ◽  
pp. 4597-4603 ◽  
Keyword(s):  
Return Loss ◽  
Wide Band ◽  
Directional Pattern ◽  
Slot Antenna ◽  
Ultra Wide Band ◽  
Radiation Patterns ◽  
Uwb Antenna ◽  
Antenna Performance ◽  
Ansoft Hfss ◽  
Radiation Behavior

This article deals with the various designs of a novel compact microstrip fed UWB antenna to investigate the corresponding return losses of different structures. The dimension of the designed antenna is 33 x 19 x 1.9 mm3 with FR4 substrate and it can be operated from 2.846 - 11.7458 GHz. The effects of varying the structure of antenna are to exhibit the investigation of corresponding return losses. Different structures of antenna are simulated in Ansoft HFSS simulator. The results of return losses and radiation patterns are explored with the ultra wide band (UWB) rectangular Stair slot antenna. The modified structure of antenna shows the minimized return loss with an enhanced bandwidth that satisfies good UWB characteristics. Antenna performance can also be explored from the radiation behavior of the antenna which is relatively omni-directional pattern for rectangular Stair slot antenna

ON-CHIP INDUCTORS OPTIMIZATION FOR ULTRA WIDE BAND LOW NOISE AMPLIFIERS

2011 ◽  
Vol 20 (07) ◽  
pp. 1231-1242 ◽  
Author(s):  
J. DEL PINO ◽  
SUNIL L. KHEMCHANDANI ◽  
ROBERTO DÍAZ-ORTEGA ◽  
R. PULIDO ◽  
H. GARCÍA-VÁZQUEZ
Keyword(s):  
Quality Factor ◽  
Noise Figure ◽  
Impedance Matching ◽  
Broad Band ◽  
Wide Band ◽  
Design Guidelines ◽  
Low Noise ◽  
Low Noise Amplifiers ◽  
Integrated Inductor ◽  
On Chip

In this work, the influence of the inductor quality factor in wide band low noise amplifiers has been studied. Electromagnetic simulations have been used to model the integrated inductor broad band response. The influence of the quality factor on LNA performance of the inductors that compound the impedance matching networks, inductive degeneration and broadband load has been studied, obtaining design guidelines for optimizing the amplifier gain flatness. Using this guidelines, an LNA with wideband input matching, shunt-peaking load, and an output buffer was designed. Using Austria Mikro Systems BiCMOS 0.35 m process, a prototype has been fabricated achieving the following measured specifications: maximum gain of 12.5 dB at 3.4 GHz with a -3 dB bandwidth of 1.7–5.3 GHz, noise figure from 4.3 to 5.2 dB, and unity gain at 9.4 GHz.

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